realizable entity role A realizable entity the manifestation of which brings about some result or end that is not essential to a continuant in virtue of the kind of thing that it is but that can be served or participated in by that kind of continuant in some kinds of natural, social or institutional contexts. role the role of a biological grandfather as legal guardian in the context of a system of laws the role of a chemical compound in an experiment the role of a patient relative as defined by a hospital administrative form the role of a person as a surgeon the role of a student in a university the role of a woman as a legal mother in the context of system of laws the role of ingested matter in digestion